Rename color header to more precise title.

#4 on develop. Seems it is not possible to change the target of an existing MR: https://github.com/isaacs/github/issues/18

I suggest you add a CONTRIBUTING.md to the project explaining the function of the branches. This information is probably written somewhere, but that is the GitHub standard way of doing it.

Most projects on GitHub today use master as the bleeding edge. What is the function of master here?